Hello everybody, we’ve been having our new 500C for 3 months now. This one makes us a lot of fun but unfortunately has such a “small” problem. We have always noticed a relatively bad air in the car and have become stunned where it probably comes from. In the search we found an extremely leaky rear window seal. That this should not be 100% dense we have already found out. But with us this is really extreme. You can use it without pressure when the cover is closed. Now our guess. Could this possibly also bring exhaust gases into the interior? I could still imagine it while standing. But it shouldn’t be during the ride. I put 3 photos (2 times our car, 1 time an example seal of any 500C) and a video. The video is recorded in the stand and also shows the whistle if you set the ventilation to level 2 and higher. Video: https://www.dropbox.com/sc/3efxjen9aowyqb2/AAB 48tLseo7z6AAjWKvfnPz4a Your opinion and experiences interest me. Best regards, Chip